Fountain or reservoir pen.



No. 718,417. PATENTED JAN. 13. 1903.

E. L. BLAKE & E. E. ELATT. FOUNTAIN 0R RESERVOIR PEN.

APPLIOATION FILED AUG. 25, 19,02.

H0 MODEL.

UNiTnD STAT-"tjs ATENT OFFICE.

EDWIN LIONEL BLAKE AND ROBERT HENRY PLATT, OF OLDHAM, ENGLAND: ASSIGNORS TO GNU PEN (AND PATENTEES) COMPANY, LIMITED, OF

OLDHAM, ENGLAND.

FOUNTAIN OR RESERVOIRPEN.

SAPEGIFIGATION forming part of Letters Patent No. 718,417, dated January 13, 1903.

Application filed August 25, 1902.

To a/ZZ whom it may concern.-

Beit known that we, EDWIN LIONEL BLAKE and ROBERT HENRY PLATT, subjects of the King of Great Britain,.residing at Oldham,

England, (whose post-office addresses are respectively 66 Belgrave road and 215 Ashton road, both of Oldham, in the county of Lancaster, England,) have invented a new and useful Improved Fountain or Reservoir Pen,v

1o (for which we have made-application for a patent in Great Britain, No. 23,988, dated November 26, 1901,) of which the following is a specificationt Our invention relates more particularly to I5 improvements in that class of fountain or reservoir pens in which a piston is employed for the purpose of charging the reservoir with ink and feeding the pen therewith, its object being to provide Inveans'whereby such pensY zo are rendered more reliable, simple, and effective than has heretofore been done.

According to our invention the pen is provided with a special locking device at the outer end of the ink-reservoir and piston end,

:a5l and thereby enables the piston to be locked in position when drawn out after charging the reservoir with ink. The feeder also is so arranged that while any ink remains in the reservoir it is always in contact with the ink,

3o the piston having concentrically a bore which the feeder enters. We attain these objects by the mechanism illustrated in the accompanying drawings, in Which-.

Figure lis an elevation,and Figs. 3 and 5 1on-V gitudinal sections, of our improved pen complete, Figs. 1 and 3 showing the piston in its outer, and Fig. 5 in its inner, position. Fig. 7 is a side view of the feeder separate; Figs. 2, 4, 6, and 8, cross-se'ctionsat lines A A, B B,

4o C O, D D of Figs. '1, 3, 5, and 7, respectively'.

Similarletters refer to similar parts throughout the several views.

In carrying out our invention and referringV to the figures generally our improved locking device consists, preferably, of anut a, screwed into the end of the ink-reservoir b, through which the piston-rod c passes, the hole in the inner half d of this nut being bored out slightly larger than the other or outward half 5o e and screwed or tapped, and the piston and the nut a and piston-rod c.

rod o having a bore c', while the piston-rod Serial No. 120,991. (No model.)

itself is formed with a screwed shoulder f at the end nearest to the piston g, which shoulder extends about one-quarter of an inch in length, the said internal screw-thread being adapted to receive the said screw-threaded shoulder f when the piston has been drawn out to its full extent. ward nut-half e is also screw-threaded and adapted to receive Ya cap h, correspondingly screw.- threaded internally and providing a .space for an india-rubber or other suitable packing c', forming an air-tight joint between By a few turns to the right the piston g is thus locked in its outer position in the reservoir b and precludes the possibility of an escape of ink through the piston becoming unlocked and accidentally forced inward, and the outer cover k is also at the same time made rigid. The outer end of the said piston-rod'has secured to it a knob l,

to which is screwed the respective end of the outer Vcover lc, which fits and is adapted to slide overk the cap h, nut ct, and reservoir b.

The ink-feeder m used is fitted into the nibnozzle n of the pen and consists of a tube of vulcanite or other kind of material, the outer end of which projects into the ink-reservoir b and enters the bore c' of the piston g when the same is in its inner position. (See Fig. t.) The outer end of the said piston has perforations p, so as to cause the ink not only to enterthe feeder at the end, but also at the sides thereof. Theinner end ofthe said feeder is split into two parts, which are slightly cranked, one thereof being adapted to fit upon the top of and the other underneath the pen-nib o.

What We claim as ourkinvention, and desire to secure by Letters Patent, is

l. In a fountain or reservoir pen, an inkreservoir having at its outer end an interi nally-screw-threaded'part, a piston inV said reservoir having a rod passing through said screw-threaded part, said rod having near the piston a threaded shoulder adapted to (See Fig. 3.) The outengage said internal screw-thread to lock the piston in a retracted position, substantially as described.

2. In a fountain or reservoir pen, an inkreservoir, a threaded nut secured to its outer end, a piston in the said reservoir the rod of ICO which passes through the said nut and which near the said piston is formed with a screwthreaded shoulder adapted to engage in the said nut and lock the piston to the said reservoir, all combined substantially as and for the purpose set forth.

3. In a fountain or reservoir pen, an inkreservoir, a piston therein having a concentrio bore, means for looking the said piston in its outer position to the said reservoir, a pen-nib nozzle at the inner end of the latter,

a feeder in the latter projecting into the reservoir and bore of the said piston when in its inner position, all combined substantially as and for the purpose set forth.

In Witness whereof we have hereunto set I our hands in presence of two witnesses. I EDWIN LIONEL BLAKE.

ROBERT HENRY PLATT. Witnesses:

ALFRED BossHARDT, STANLEY E. BRAMALL. 

